of detroit



M- 'HBBETFS.

VIBRATION DAMPlNG DEVICE.

APfLiCATION men MAY 21. ms.

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UNITED STATES MILTON 'I'IBBETTS, OI DETROIT, MICHIGAN, COMPANY, OF DETROIT, MICHIGAN, A

VIBRATION DAMPIN G DEVICE.

PATENT OFFICE.

nssronon 1'0 racxnnnnorm m conronnrron or mrcnmm.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application mone 27, 1915. Serial No. 30,770.

' To all whom it may concern:

Be it known that I,'"MILTON 'lrsnnrrs, a citizen of the United States, and resident of Detroit, Wayne county, State of Michi an, have invented certain new and useful mprovements in Vibration Damping Deviccs, of which the followin .simple and practical construction, and one one of the ends of a crank s in which the wear-kg; parts may be easily removed and replace Other objects of the invention will appear from the following description, taken in connection with the drawings which form a art of'this specification, and in which igure 1-is a sectional view of a device embodying the invention, the up or half bB-' ing substantially on the line 1* 0 Fig. 2, the lower left hand side being on the line 1", and the lower right hand side being on the line .1, of said figure;

Fig. 2 is a. front view of one half of the device shown in Fig. 1; a

Fig. 3 is a perspective view of a section of one of the friction disks; and d litig. 4 is a similar view of another form of Refcrrin to the drawin 10 ,re resents g i zlft of :Fhydrocarbon motor, preferably of the multi-cylinder type. The vibration damper is mounted n and prefora'bl entirely supported by is end of the cran shaft, and it comprises two relatively rotatable members, one of which is integrally formed with or secured or keyed to the crank shaft. In the form of the invention shown in Figs. 1 and 2, the inner member 11-is keyed to the crank-shaft as by the'kc 12 and secured thereon b a nut 13, whic l has'tecth 14 on its outer use to coiiperate with similar teeth on a starting crank, not shown.

The inner member 11 is formed with a. cylindrical surface 15 andan integral friction late-portion 16 at one end of tins cvlin rical surface. At theother end, and spaced from the plate POl'llOll 16 1s a dcmaterial 23 suitably attached the rivets'it't. These disks,

tachable plate 17, fastened to the member 11 by the screws 18. It will be seen that the friction plates 16 and 17 are s aced apart some distance and thecylindrica surface 15, which is concentric with the axis of the crank shaft 10, is arranged between the pl ates.

lhe outer membcr of the dam r oomg'lses' a heavy metallic ring 19, w rich may called the fi "wheel part of the dam and-it is forum with an inwardly undid; portion 20, in which are drilled several 0 lugs 21, for a purpose hereinafter descri d.

is portion 20 is arra-n d' between the Th friction plates 16 and 17 of t e inner member 11, and its inner cylindrical surface is adapted to" fit and have a bearing u nthe;

cylindrical surface 15 of said mem r 11. Thus the flywheel 19 may rotate freely relative to the inner member exce faiths-friction means hereinafter descr1bed,'and it is held in place on the inn r member by means of the detachable plate l i.

Frictional elements are introduced be tween the portion 20 of the flywheel and the friction plates 16 and 17, these elements as shown being in the form of stampedmetal disks 22 havin suitable lining or wearing thereto as by it will be seen, also fit loosely on the cylindrical surface 15 of the innenmembcr, and may be removedand replaced with the fly-wheel 19 by removing the friction plate 17. The disks 22 are referably ade ted to rotate with the fly-w eel 19, and t therefore stamped with suitably spaced bosses 25 which are adapted to enter certain of the openin 21 so that the fiyd vheel will carry the di'ss around with it. The disks 22 and press them in'contact with the friction lates 16 ,and 17 of the inner member 11, this causing a frictional driving connection between the inner member and the flywheel or outer member 19.

ln lm-nung the recesses 26, the metal is pros-sod outwardly at-the other side of the ey are' diskand forms a. boss 28 which enters an a the dis et bers.

for the bosses 25 and I her, frict on -l.woen said part It will be understood that any suitable number of o nings 21 and correspondin bosses 25 an springs 27 may be emploge but in the form shown'in Figs. 1 and 2t ere are 8 of these openings, 4 of them being used the other 4 for the spring housings.

Another form of friction disk is illustrated in perspective in Fig. 4. In this disk, the bosses25 are the same as those shown in the disk abovedescribed, but in lieu of the springs 27, the disk 22 is formed with sprin tongues 27 which are stamped at suitab e points in the surface of the disk.

The disk inthis case is'm'ade of suitable s ring material so that the spring means of ie device is formed as an integral part of the friction Other. and I I without departing or V of this invention.

aving thus described my invention, when I claim and desire to secure by Letters Patent j- 1. Ina device of the class described, in combination, aninner -member, an outer rel ativcly' iutatablc member, friction disks betweenfisaid' members, and means for yielddisks to form a noinglyscpa f i gise d ion between the memrelativel'y rotatable member, one of said ecn the mernbe similar forms of the device may from the spirit tional driving conn 2. In a device of the class described, in combination, on inner member, an outer members-having a part arranged intermediate opposing plate arts of the other memisks rs, and means carried by said intermediate part for yieldingly operating the disks to secum 0. driving conn tion between the mom- 3. In a device of the class described, in combination, an inner member having spaced radial plate'parts, oneof said parts being removable, an'outer relatively rotatable-- member having a part arranged between said plate parts,- iriction disks between said part 0 the outer member and said plate parts of the inner member, and '-.(n-ings ope ating on said disks for producing a frictional tdriving connectmn between mid members.

4. In a device of the class described, in combination, an inner member having two spaced radial plate parts, one of said parts being removable, an outer mlativcly rotala'plu member having a part arranger etweon said plate purls. friction disks boof the outer memla-r and said plate parts ol the inner member, and springs carri d by said part of the outer on said disks for member and operatin driving connection B'oducing a frictiona tween said members. 4

5. Inc device of the class described, in combination, an inner member having two spaced radial plate parts, one of sai part being removable, an outer relatively rotatable member having a part arranged tween said plate arts, friction disks between ,said part 0 the outer member and said late parts of the inner member, and a series of springs each of which acts upon both said disks tending to separate them and therebfi produce a. frictional driving connection etween said members. a go 6. In a device of the class described, in combination, an inner member having two spaced radial late parts, one of-said parts being rcmovab e, an outerrelatively rotatable member having a part arranged .be' tween said plate arts, friction (llSkS bc-' tween said part c ,the outer, member mass; said late parts of the inner member, and coile springs housed fin said part'-,oi th c outer member and operating on saidgdisks ,for the purpose describe a '7. In a device of the cl combination,

an nner memblenoaniouter member, friction-jdisksibetween said menv hers,- andmeans arranged'between two of 1 said disks "and housed within one of said members, for yieldingly.scparatingthe to form a'frictionaldriving con ection between tlie members. l

S. In a vibration a shaft, a pair of se arated a ll wheel mounted plates thereon.-

etween said plates and rotatable relativel thereto friction elements between the flyvv eel an the plates, and

sprin mounted in the flywheel and actin on said elements to produce a frictions. driving connecton fortheflyvvheeI, p l

9'. In a vibration damper, n combination,

a shaft, a pair of separated plates thereon, a flywheel mounted between sai plates and 11- rotatable relativeh thereto, a friction disk between each sai plate and the adjacent side of the flywheel, and springs in the flywheel acting on the disks, fonthe purpose described. i a r 116 10. In a vibration damper, in combination, a shaft, apair of so arated plates thereon, a flywheel mounter between said plates and rotatable relatively thereto, a friction disk lmtwecn cachrsaid plate and the 120 adjacent side of the flywheel, and springs between said disks and the flywheel for pressing the disks into contact with the plates, for the purpose described.

11. In a vibration damper, in wmbination. a shaft. a member keyed thereto and having a cylimlrical bearing surfam and a; friction plate, a flywheel having a hearing: on said cylindrical emfacu, a friction disk on each side of said flywheel and having means .130

damper, incombiiiation, 100 v eausin them to turn therewith, a friction plate etachably secured to said member to retain said flywheel and disks in place, and sprinF means adapted to maintain a frictiona driving connection between said memher and said flywheel.

12. In a vibration damper, in combination, a shaft having a cylindrical bearing surface and a friction plate, a flywheel having a bearing on said cyl1ndricalsurfaoe,a friction disk on each side of said flywheel and having means causing them to turn therewith, a friction plate detachably secured to said member to retain said flywheel and disks'in place and "a series of coil springs housed in said flywheel and adapted to maintain a frictional driving connection between said member and said fi wheel.

13. n a vibration damper, in combination, an inner member comprising separated plates, an outer member having a portion arranged between said plates and having openings 'in said portion, friction disks having stamped out portions .to enter some of said openings to cause the disks to turn with the outer member, and springs arranged in others of said openings for opersting said disks.

14. In a vibration damper, in combination, an inner member comprising separated plates, an outer member havin a portion arranged between said plates anghavin openings in said portion, friction disks aving a'member keyed thereto and stamped out portions to enter some of'saiid openings to cause the disks to turn with the outer member, and springs arranged in 15. In a vibration damper, in combination an inner mem'ber com risin se arated plates, 11 enter member aving a ortion arrang between said plates and swing openings in said portion, friction disks havin' stamped out portions to enter some of sai openings to cause the disks to turn with the outer member, and having stamped recesses, and springs arranged in others of said openings and entering said t is; for pressing said disks apart and in frictional contact with said plates.

16. In a device of the class described, in combination, an inner member, an outer relatively rotatable member, one of said members having a part arr-an ed intermediate opposing plate parts of a other member, friction disks between the members, and means for yieldingly separating said disks to form a frictional driving connection between,

the members.

In testimony whereof I aifix my signature 1n the presence of two witnesses.

MILTON TIBBETTS.

\Vitnesses:

Ln R01 J. W'ILLIAMB, (3mm J. Corn. 

